CS506 Assignment 1 Complete Solution || CS 506 Assignemtn 2021

Assignment Solution File Here:

 

Employee.java

 public class Employee {

private int empid;

private String empName;

//vuportal.com

private int empExperience;

private String qualification;

private int Salary;

private String dept;

public int getEmpid() {

return empid;

}

public void setEmpid(int empid) {

this.empid = empid;

}

 

Lecture 3: Learning Basics

3.1 Strings A string is commonly considered to be a sequence of characters stored in memory and accessible as a unit. Strings in java are represented as objects. 

3.1.1  String Concatenation 

• “+” operator is used to concatenate strings  o System.out.println(“Hello” + “World”) will print Hello World on console  •   String  concatenated with  any  other  data  type  such  as  int  will  also  convert  that datatype to String and the result will be a concatenated String displayed on console. For example,  o int i = 4; o int j = 5;   System.out.println (“Hello” + i);// will print Hello 4 on screen   o However 

 System.out.println(i+j);//will print 9 on the console because both i and j are of type int.  

3.1.2  Comparing Strings 

For comparing Strings never use == operator, use equals method of String class.  •   == operator compares addresses (shallow comparison) while equals compares values (deep comparison) 

• E.g. string1.equals(string2)

Example Code: String concatenation and comparison  public class StringTest { public static void main(String[] args) { int i = 4; int j = 5; System.out.println("Hello" + i); // will print Hello4 System.out.println(i + j); // will print 9 String s1 = new String (“pakistan”);  

String s2 = “pakistan”; if (s1 == s2) { System.out.println(“comparing string using == operator”); } if (s1.equals( s2) ) { System.out.println(“comparing string using equal method”); } } }  

On execution of the above program, following output will produce .